System and method for iq imbalance estimation using loopback...

H - Electricity – 04 – B

Patent

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H04B 17/00 (2006.01)

Patent

CA 2724735

Systems and methods for estimating IQ imbalance in a communication system are provided. In various embodiments, a device is configured to perform a self-characterization. The self- characterization is performed over an RF loopback circuit. In some embodiments, a probe is transmitted over the RF loopback circuit. The probe uses a frequency offset such that an image related to one IQ imbalance is separated from an image related to another IQ imbalance. An imbalance estimate is calculated based on processing of the probe.

[0078] L'invention concerne des systèmes et des procédés permettant d'estimer un déséquilibre série avec quadrature (IQ) dans un système de communication. Dans divers modes de réalisation, un dispositif est configuré pour effectuer une auto caractérisation. L'auto caractérisation est effectuée sur un circuit de boucle de retour HF. Dans certains modes de réalisation, une sonde est transmise sur le circuit de boucle de retour HF. La sonde utilise un décalage en fréquence de telle sorte qu'une image se rapportant à un déséquilibre IQ est séparée d'une image se rapportant à un autre déséquilibre IQ. Une estimation du déséquilibre est calculée sur la base du traitement de la sonde.

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